I'm currently on S6 but I have to add
Dexter Morgan- fascinating character, I actually love him and can't find a reason to dislike him at all despite the killing, he seems to focus on his bad points but never acknowledges the good things about himself. I also feel that his social awkwardness is something people can relate to without being serial killers/psychopaths themselves.
Debra Morgan- his sister is so ******* funny (as she would say)
she's a badass and I love her bluntness and how she says exactly what she thinks, also the stuff she comes out with is hilarious.